Air-brake controlling-valve.



PATENTED APR. 26. 1904.

:N ol 758,174.

. I. B. COREY.

AIR BRAKE CONTROLLING VALVE. APPLICATION rum) nov. 20, 1903. no menu. 12 SHEEN-sum -1.

' Inventor.

Witnesses PredBCorey.

I ;Rtty.

No. 758,174 PATENTED APR. 26, 1904.

- F. B. COREY. v AIR BRAKE CONTROLLING VALVE.

APPLIUATIOY FILED NOV. 30, 1903. I No MQDEL. 2 SHEETS-SHEET 2- Fig.7. 38

' I g I 1 l i- I 42 '43 Flqfi. 40

E TDR. Fr'eci'B, GOre l WM UNITED. STATES FRED B.

Patented April 26, 1904.;

PATENT OFFICE.

ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

AIR-BRAKE CONTROLLING-VALVE.

SPECIFICATION forming part of Letters Patent No. 758,174, dated April26, 1904.

Application filed November 20,1903; Serialll'o. 1532,035 (No model.)

To all whom it may concern: Be it known that I, FRED B. COREY, a citizenof the United States, residing at Schenectady,-

county of Schenectady, State of New York, have invented certain new anduseful Improvements in Air-Brake Controlling .-Valves, of which thefollowing is a specification.

My'invention relates to air-brake controlling-valves such as areemployed in air-brake systems for controlling the passage of air to andfrom the train-pipe in the operation of the brake mechanism, and it hasreference particularly to valves of this type which are provided with anauxiliary valve mechanism for controlling the flow of compressed air tosome device independent of the air-brake system, such asa track-sanderor pneumatic signal. Where such valves are left exposed, as is common instreet-railway practice where both ends of the car areprovided withduplicate equipments, it becomes necessary to provide some means forpreventing the operation ofthe valve mechanism by unauthorized persons.This is usually done in the case of the main controlling valve byproviding a removable handle,which the operator takes with 7 him onleaving the valve.

The principal object of the present inveution is to provide acontrolling-valve of this type with certain improvements designed toprevent any unauthorized use of the auxiliary valve; and to this end myinvention comprises certain features, among which maybe men'- tioned thefollowing: first, auxiliary valveoperating mechanism which extends upthrough the main-valve stem; second, a re movable push-button on theiendofthe-mainvalve stem for operating the auxiliary valve;

third, means for rendering the auxiliary valve inoperative'to controlits passage whenever the operating-lever of the main controllingvalve isremoved, and, fourth, means for ren- "main. reservoir or atmosphere.

illustrated difierent embodiments of my-infvention.

In the drawings, Figure 1 is a partial vertical section of acontrolling-valve for 'socalled straight air-brake systems embodying thefeatures of my invention, the section being takenon the line 1 1 of Fig.3. FigrQ is a fragmentary section taken on the line 2 2' of Fig *3. Fig.3 is a plan view of the valvebody. Fig. L is aplan view of the maincontrolling=valve. v Fig. 5 is a similar view of the main-valve stem;Fig. 6 is a plan view of a portion of the main-valve-contfollingleverandthe valve-bonnet. Figs. 7 and 8 are views similar to Fig. 1,illustrating modifications, and Figs. 9 and 10 are detail views of thelatch mechanism employed in the modification a resting upon the upperface of said base, a

valve-stem 12, interlocking with said rotary valve, a bonnet 13 forinclosing said valve and stem, and an operating-lever 14, removablysecured to the upper end of said stem. The

base 1Q is. provided with main reservoir,-at-

mosphere, and train-pipe ports R A T, which are adaptedto cooperate withthe bridgedport P in the rotary valve 11 to establish connection betweenthe train-pipe and either the valvell is given the necessary movementsto The rotary establish said connections by the stem '12,

which is provided on its lower end with'lugs 15 16, adapted to fitbetween the cooperating lugs 17 and 18 on the upper face of the rotaryvalve- As is usual in valves of this type," the bonnet is provided witha flange 19 and stops 2O 21, which cooperate with the springpressed pawl22 and the projection 23 on the operating-lever to indicate to theoperator the various operative positions of the main valve. In additionto limiting the movement of the operating-lever by engagement withthestops 2O 21 the projection 23 by engaging the un-' der side of theflange 19 prevents the removal of the operating-lever at all times whenthe main valve is not in lap position. When this position of the mainvalve is reached, the notch 24 in the flange 19 registers with theprojection 23 and permits the ready removal of the operating-lever.

Referring now to the auxiliary valve construction, it will be noted thatthe lower end of the main-valve stem 12 is provided with a rib 25, whichis adapted to engage a cooperating surface on the interior of thevalve-bonnet to establish an air-tight partition between the main-valvechamber below it and the cavity 26 above it. In the drawings this cavityis in the nature of a groove which extends around the conical face ofthe lower end of the stem '12. A port 27 extends through the main-valvestem at this point and communicates at its center with the valve-chamberbelow said stem. The cavity 26 is also adapted to be placed in directcommunication with the port 28, which is designed to lead to the sanderor other independent pneumatic device to be operated. A groove 29 in themainvalve seat allows compressed air to pass from the main reservoir tothe upper side of the rotary valve 11 and for certain positions of theauxiliary valve mechanism through the port 27 the cavity 26, and port 28to the independent pneumatic device. This passage, however, is normallyclosed by an auxiliary valve 30, seated in the lower end of themainvalve'stem and normally held in-closed position by a coiled spring31. 'The stem 32 of this auxiliary valve 30 extends upward through anopening in the main-valve stem 12 and in the preferred form of theinvention terminates at the upper end of said mainvalve stem. Theoperating-lever 14 is pro- .vided with a push-button 33, locateddirectly above the auxiliary-valve stem in such a position that whenpressed downward the auxiliary valve will be opened. This push-button isprovided with a headed shank 34, which passes through an aperture in aplate 35, held in position in the head of the operating-lever by a ring36.

Since the auxiliary-valve stem extends to the upper end of themain-valve stem, whenever the operating-lever is removed and the valveisleft some means must be provided for preventing the opening of theauxiliary valve by pressing upon the upper end of its stem, as might bereadily done with a pencil or sharp instrument. This means consists inthe preferred form of a valve 37, extending upward from the rib 25 atthe lower end of the main-valve stem and serving to close the port 28when the main valve is in the lap position and the operating-lever is ina position to be removed.

In order to insure a correct assembly of the main rotary valve 11 andits stem 12, so as to bring the valve 37 over the port 28 when the mainvalve-ports are lapped, the lugs 15 16 on the lowerend of the valve-stemare tapered, so that they can be fitted between the inner tapered facesof the lugs 17 18 of the rotary valve only when the parts are inposition to bring about the desired relation.

In the modifications shown "in Figs. 7 and 8 the valve 37 is omitted, sothat for all positions of the main valve air may be supplied to theauxiliary pneumatic device by simply operating the auxiliary valve. Inorder to prevent the unauthorized operation of this valve when theattendant is absent and the operating-lever removed, two diiferentarrangements are shown. In the arrangement of Fig. 7 a shortauxiliary-valve stern and a removable push-button are employed, and inthe arrangement of Fig. 8 the auxiliary-valve stem is latched when theoperating-lever of the main valve is removed. In Fig. 7 theauxiliary-valve stem 38 terminates short of the upper end of themain-valve stem and is engaged at its upper end by the lower end of theshank of the push-button 39, which is preferably somewhat longer thanthe end of the valve-stem, so that the lever cannot be removed withoutremoving the push-button.

In Fig. 8 the auxiliary-valve stem 40 is provided with a button 41,rigidly secured thereto and located above the upper end of themain-valve stem. When the operating-lever is in position, the auxiliaryvalve is operated by pressing upon the button 41; but when theoperating-lever is removed a latch engages the auxiliary-valve stem andprevents its movement, This latch consists, essentially, of aspring-pressed plate 42, located in a lateral recess in the upper end ofthe main-valve stem, cooperating with agroove 43 in the auxiliary-valvestein, located so as to' be up posite the plate when the auxiliary valveis closed. A spring 44, tends to force the plate 42 into the groove 43,but is prevented from doing so when the main valve operating lever is inposition on the main-valve stern by the outer end of the plate engagingthe head of the operating-lever, as clearly shown in Fig. 8. When theoperating-lever 14 is removed and the auxiliary valve is closed, theplate 42 will be moved into the notch of the auxiliaryvalve stem, asshown in Fig. 9. As there in dicated, the outer end of the plate 42 isrounded off, so that whenvthe operating-lever is put in position on themain-valve stem'the plate will be forced backward into its nonlatchingposition.

I do not wish tobe limited to the specific constructions herein shown,since it is apparent that many alterations and modifications may be madewithout departing from the spirit of my invention, and I aim to cover bythe terms of the appended claims all such alterations and modifications.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

1. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve arranged tocontrol a passage for the supply of air to a device independent of theair-brake system, and operating mechanism for said seated in the stem ofthe main controllingvalve and arranged to control a passage for thesupply of air to a device independent of the air-brake system, andoperating mechanism for the said auxiliary valve extending up throughthe stem of the said main controllingvalve.

3. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve, and meansfor rendering the said auxiliary valve inoperative to control thepassage in which it is included when the operating-lever is removed fromthe stem of the controllingvalve.

4. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-l ever, of an auxiliary valve arrangedto control a passage for the supply of air to a device independent ofthe air-brake system, and means for rendering the said auxiliary valveinoperative to control said passage when the operating-lever is removedfrom the stem of the controlling-valve.

5. The combination with an air-brake controlling-valve having a stemadapted-to receive an operating-lever, of an auxiliary valve seated inthe stem of the main controllingvalve, and means for rendering the saidauxiliary valve inoperative to control the passage in which it isinoluded'when the operating-lever is removed from the stem of thecontrolling-valve.

6. The combination with an air-brake controlling-valve having, a stemadapted to receive an operating-lever, of an auxiliary valve seated inthe stem of the main controllingvalve and arranged to control a passagefor arranged to control a passage for the supply of air to a deviceindependent of the air-brake system, and a removable push-button on theend of the controlling-valve stem for operating the said auxiliaryvalve.

8. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve seated inthe stem of the main controllingvalve and arranged to control a passagefor the supply of air to a device independent of the air-brake system,and a removable pushbutton on the end of the controlling-valve stem foroperating the said auxiliary valve.

9. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve arranged tocontrol a passage for the supply of air to a device independent of theair-brake system, and means for rendering the said auxiliary valveinoperative to control said pas sage whenever the operating-lever isbrought to the lap position.

10. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve arrangedtocontrol a passage for the supply of air to a device independent of theair-brake system, and means for closing said passage whenever theoperating-lever is'brought to the lap position.

11. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve arranged tocontrol a passage for the supply of air to a device independent of theair-brake.

system, and another valve carried by the stem of the maincontrolling-valve for closing said passage when the operating-lever isbrought to the lap position.

12. The combination with an air-brake controlling-valve having a stemadapted to receive an operating-lever, of an auxiliary valve arranged tocontrol a passage for the supply of air to a device independent of theair-brake system, and operating mechanism for said FRED B. COREY.

Witnesses: V

BENJAMIN B. HULL, -HELEN ORFORD.

